Transactive discussions with peers and adults.

Piaget (1932) hypothesized that peer and adult–child discussions of moral dilemmas are qualitatively different and that children are more likely to use reasoning when interacting with peers. To test this hypothesis, the present study compared the interactive styles of child–child and adult–child dyads engaged in discussions of moral dilemmas, focusing on the use of logical operations (transacts). 48 7- and 11-yr-old girls were paired with either a female agemate or their mother. Ss used transacts in a higher proportion of their conversational turns when interacting with peers than when interacting with mothers. Ss produced proportionally more transactive responses when interacting with mothers because mothers produced proportionally more requests for idea clarification than did peer partners. Self-generated transacts, on the other hand, were produced proportionally more often with peers. When paired with peers, Ss produced transactive statements that operated on the partner's logic more often rather than clarifying their own logic. Results support Piaget's contention that moral discussions with peers feature a more spontaneous use of reasoning than do discussions with adults. (21 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Domestic dogs (Canis familiaris) use human and conspecific social cues to locate hidden food.

Ten domestic dogs (Canis familiaris) of different breeds and ages were exposed to 2 different social cues indicating the location of hidden food, each provided by both a human informant and a conspecific informant (for a total of 4 different social cues). For the local enhancement cue, the informant approached the location where food was hidden and then stayed beside it. For the gaze and point cue, the informant stood equidistant between 2 hiding locations and bodily oriented and gazed toward the 1 in which food was hidden (the human informant also pointed). Eight of the 10 subjects, including the one 6-month-old juvenile, were above chance with 2 or more cues. Results are discussed in terms of the phylogenetic and ontogenetic processes by means of which dogs come to use social cues to locate food. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

What's in a manner of speaking? Children's sensitivity to partner-specific referential precedents.

Do young children form “referential pacts”? If a person has referred to an object with a certain term (e.g., the horse), will children expect this person to use this term in the future but allow others to use a different expression (e.g., the pony)? One hundred twenty-eight children between 3 and 5 years old co-operated with an experimenter (E1) to move toys to new locations on a shelf. E1 established referential terms for all toys in a warm-up game. Then, either the original partner, E1, or a new partner, E2, played a second game with the same toys. In this game, the experimenters referred to toys using either their original terms from the warm-up game or new terms. Children were slower to react to new terms than old, and this difference in reaction times was greater in the original partner condition (but only on the first trial). Children sometimes protested at the use of new terms, doing so regardless of their interlocutor's identity. We contrast these findings with those for adults and discuss their implications for the debate regarding the nature of referential pacts. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Extrinsic rewards undermine altruistic tendencies in 20-month-olds.

The current study investigated the influence of rewards on very young children's helping behavior. After 20-month-old infants received a material reward during a treatment phase, they subsequently were less likely to engage in further helping during a test phase as compared with infants who had previously received social praise or no reward at all. This so-called overjustification effect suggests that even the earliest helping behaviors of young children are intrinsically motivated and that socialization practices involving extrinsic rewards can undermine this tendency. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The sources of normativity: Young children's awareness of the normative structure of games.

In two studies, the authors investigated 2- and 3-year-old children's awareness of the normative structure of conventional games. In the target conditions, an experimenter showed a child how to play a simple rule game. After the child and the experimenter had played for a while, a puppet came (controlled by a 2nd experimenter), asked to join in, and then performed an action that constituted a mistake in the game. In control conditions, the puppet performed the exact same action as in the experimental conditions, but the context was different such that this act did not constitute a mistake. Children's normative responses to the puppet's acts (e.g., protest, critique, or teaching) were scored. Both age groups performed more normative responses in the target than in the control conditions, but the 3-year-olds did so on a more explicit level. These studies demonstrate in a particularly strong way that even very young children have some grasp of the normative structure of conventional activities. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Young children's responses to guilt displays.

Displaying guilt after a transgression serves to appease the victim and other group members, restore interpersonal relationships, and indicate the transgressors' awareness of and desire to conform to the group's norms. We investigated whether and when young children are sensitive to these functions of guilt displays. In Study 1, after 4- and 5-year-old children watched videos of transgressors either displaying guilt (without explicitly apologizing) or not displaying guilt, 5-year-olds appropriately inferred that the victim would be madder at the unremorseful transgressor and would prefer the remorseful transgressor. They also said that they would prefer to interact with the remorseful transgressor, judged the unremorseful transgressor to be meaner, and, in a distribution of resources task, gave more resources to the remorseful transgressor. The 4-year-olds did not draw any of these inferences and distributed the resources equally. However, Study 2 showed that 4-year-olds were able to draw appropriate inferences about transgressors who explicitly apologized versus those who did not apologize. Thus, 4-year-olds seem to know the appeasement functions that explicit apologies serve but only when children have reached the age of 5 years do they seem to grasp the emotions that apologies stand for, namely, guilt and remorse, and the appeasement functions that displaying these emotions serve. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Laparoscopic cholecystectomy: evaluation of intraoperative complications with respect to 2 different kinds of anesthesia

Two anaesthetic managements for elective laparoscopic cholecystectomy were compared in 64 patients in order to investigate some perioperative complications: 1) bowel distension during surgery. 2) recovery from anaesthesia. 3) post-surgery incidence of emesis and pain. In addition, the quality of postoperative peristalsis as well as the time of dimissal were recorded. Group I (n = 30) was treated with NLA in N2O-O2 and Group II (n = 34) received propofol plus fentanyl in air-O2. Bowel distension, evaluated by surgeon at 15 min intervals throughout the operation was similar in both the groups as well as postoperative peristalsis recuperation. During the first 12 hours after laparoscopy no differences were found at any times of observation in the incidence or severity of emesis and pain between the two different anaesthesia patients. In subjects which were given propofol the psychomotor recovery was more rapid than after NLA, particularly during the first 6 hours after surgery. The patients were discharged between 36-48 hours following the operation independently from anaesthetic management. It is concluded that both the anaesthetic techniques provide similar intra/postoperative conditions, except the early recovery that is more rapid for the propofol patients. The overall frequency of emesis and pain was rather high in both the groups, suggesting a routine medication with analgesics and antiemetics.     

The solitary benign ulcer of the colon: a report of a case located in the cecum

The authors report a case of benign solitary cecal ulcer, occurred recently to their observation and diagnosed during operation. The patient was undergo an operation of right hemicolectomy. The preoperative diagnosis of lesion kind and its localization is difficult because it's a rare disease as well as literature reports; in fact the benign solitary colon ulcer can be differentiated with difficult from a perforated appendicitis, an inflammatory disease and a colon carcinoma. The authors discuss about probable etiologic factors, clinical features and surgical treatment.     

Anatomy of Skyrmionic Textures in Magnetic Multilayers

Room temperature magnetic skyrmions in magnetic multilayers are considered as information carriers for future spintronic applications. Currently, a detailed understanding of the skyrmion stabilization mechanisms is still lacking in these systems. To gain more insight, it is first and foremost essential to determine the full real‐space spin configuration. Here, two advanced X‐ray techniques are applied, based on magnetic circular dichroism, to investigate the spin textures of skyrmions in [Ta/CoFeB/MgO]_n multilayers. First, by using ptychography, a high‐resolution diffraction imaging technique, the 2D out‐of‐plane spin profile of skyrmions with a spatial resolution of 10 nm is determined. Second, by performing circular dichroism in resonant elastic X‐ray scattering, it is demonstrated that the chirality of the magnetic structure undergoes a depth‐dependent evolution. This suggests that the skyrmion structure is a complex 3D structure rather than an identical planar texture throughout the layer stack. The analyses of the spin textures confirm the theoretical predictions that the dipole–dipole interactions together with the external magnetic field play an important role in stabilizing sub‐100 nm diameter skyrmions and the hybrid structure of the skyrmion domain wall. This combined X‐ray‐based approach opens the door for in‐depth studies of magnetic skyrmion systems, which allows for precise engineering of optimized skyrmion heterostructures.